198042 has 16 divisors (see below), whose sum is σ = 426720. Its totient is φ = 60912.

The previous prime is 198031. The next prime is 198043. The reversal of 198042 is 240891.

198042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (198043) by changing a digit.

198042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1192 + ... + 1347.

It is an arithmetic number, because the mean of its divisors is an integer number (26670).

2¹⁹⁸⁰⁴² is an apocalyptic number.

198042 is an abundant number, since it is smaller than the sum of its proper divisors (228678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198042 is a wasteful number, since it uses less digits than its factorization.

198042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2557.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 198042 is about 445.0191007137. The cubic root of 198042 is about 58.2888876863.

Subtracting 198042 from its reverse (240891), we obtain a square (42849 = 207²).

The spelling of 198042 in words is "one hundred ninety-eight thousand, forty-two".